The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
20 */7 * * *
This cron command translates to the following (in Human-Readable format):
“Every 7 hours at 20 minutes past the hour.”
What is a Cron Job & Crontab?
A cron job is a scheduled task that is typically executed automatically at a predetermined time or interval. Cron jobs are often used to perform routine system maintenance tasks, such as backing up files or databases, deleting temporary files, or sending email notifications.
A crontab is a file that contains commands to be run at specified times. The crontab file is typically edited using the crontab command, which can be used to list, edit, or delete the contents of the file.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 7 hours at 20 minutes past the hour“:
FUN FACT: When troubleshooting issues with cron jobs, it can be helpful to run them manually from the command line – this will allow you to see any error messages that might be generated..
You might want to set up a crontab or cron job to run every 7 hours at 20 minutes past the hour for several reasons, including:
- Automated backups
- Checking for system updates
- Generating reports
- Fetching remote data
Similar Cron Jobs
You might also want to run a crontab:
- every 11 hours
- every 6 hours
- every 1 hour
- every 3 hours
- every 7 hours
- every hour between 1:00 pm and 4:00 pm
- every hour between 2:00 pm and 5:00 pm
- every 3 hours at 40 minutes past the hour
FUN FACT: If you need to delete a cron job, simply remove the corresponding line from the crontab file and save your changes..
In this article, you learned how to set up a cron job that runs every 7 hours at 20 minutes past the hour. Please share this page with friends and colleagues if you find it useful.
If you have any questions, please don’t hesitate to comment below.
If you are looking for cron jobs that run at certain minutes, hours, days, weekdays, or months, or if you are looking for miscellaneous cron jobs, then check out our relevant sections, or visit our cron job cheat sheet for a list of hundreds of popular cron jobs.